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Anticorrosion prestressed bars and its manufacture method

A technology of prestressing tendons and manufacturing methods, which is applied in manufacturing tools, ceramic molding machines, metal material coating processes, etc. The effect of good focus, low cost of raw materials and processing and manufacturing

Inactive Publication Date: 2006-03-29
LIUZHOU OVM MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problems of poor anticorrosion properties of ordinary steel bars, high-strength steel wires and smooth steel strands used as prestressed steel strands and good corrosion resistance of sprayed steel strands, but high manufacturing costs, long production cycles, and difficult construction and installation processes. To solve the cumbersome problems, provide an anti-corrosion prestressed tendon with good product performance, short production cycle, low manufacturing and construction costs and its manufacturing method

Method used

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  • Anticorrosion prestressed bars and its manufacture method
  • Anticorrosion prestressed bars and its manufacture method
  • Anticorrosion prestressed bars and its manufacture method

Examples

Experimental program
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Effect test

Embodiment 1

[0051] An anti-corrosion prestressed tendon-blackened high-strength steel wire or blackened steel strand. It is a blackened high-strength steel wire or blackened steel strand made by treating ordinary high-strength steel wire or smooth steel strand with a surface blackening process. The outer surface of the blackened high-strength steel wire or blackened steel strand is formed with a layer of black The film layer composition contains both Fe 3 o 4 , also contains FeS, CuS oxidation anti-corrosion layer.

[0052] The method for carrying out high-strength steel wire or ordinary steel strand blackening process using the normal temperature iron and steel surface sensitization blackening agent composed of sensitizing liquid and normal temperature blackening liquid comprises the following process (see figure 1 , figure 2 ):

[0053] A, pretreatment process: degreasing and derusting pretreatment to the ordinary high-strength steel wire or smooth steel strand 2 unwound from the p...

Embodiment 2

[0074] An anti-corrosion prestressed tendon - blackened steel bar. It is a blackened steel bar made by treating ordinary steel bars with a surface blackening process. The outer surface of the blackened steel bar is formed with a layer of black film. The composition of the film layer contains Fe 3 o 4 , also contains FeS, CuS oxidation anti-corrosion layer. The surface blackening process treatment method and the normal temperature steel surface sensitization blackening agent adopted are the same as those in Example 1, the difference is that the steel bar has a larger diameter and cannot be wound into a coil, and can only be processed individually. Increase the size of the tanks or utensils used in pretreatment, cleaning I, sensitization, cleaning II, blackening, cleaning III, post-treatment, etc., and the drying process is carried out in an oven or a drying room. The black steel bars can be stacked neatly in the drying room.

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Abstract

An anticorrosion prestressed steel bar is prepared from the ordinary steel bar through pretreating, washing, sensitizing, washing, blackening, washing, posttreating and baking. Its advantages are high anticorrosion performance, low cost, high adhesion of film layer, and no poison, odour and irritative smell of its discharged substance.

Description

1. Technical field: [0001] The invention relates to a component used in prestressed engineering, in particular to an anti-corrosion prestressed tendon used in prestressed concrete construction engineering and a manufacturing method thereof. 2. Background technology: [0002] The prestressed tendons used in existing prestressed concrete construction projects generally include steel bars, high-strength steel wires, and steel strands. The steel strands used can be divided into smooth steel strands, galvanized steel strands, and sprayed steel strands. There are several types, which are suitable for different construction conditions and engineering design requirements. The shortcomings of the above products are: [0003] One: the outer surface of ordinary steel bars, high-strength steel wires, and smooth steel strands is not treated with special anti-corrosion treatment, and the anti-corrosion performance is poor. In the construction environment on site, they are easily corroded,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/62B28B23/02
Inventor 陈谦张升华谢正元杨庆黄激扬梁来关炳良黄永诚庞维林李炎德吕行李文献强壮赖祥智赵靖钊
Owner LIUZHOU OVM MASCH CO LTD
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